Retina, detached

Retina, detached
: A retina that separates from its connection at the back of the eye. The process of retinal detachment is usually due to a tear (a rip) in the retina, often when the vitreous gel pulls loose or separates from its attachment to the retina, most commonly along the outside edge of the eye. (The vitreous is a clear gel that fills most of the inside of the eye between the retina and the lens. If the retina is weak when the vitreous gel pulls loose, the retina will tear.) This rip is sometimes accompanied by bleeding if a blood vessel is also torn. After the retina has torn, liquid from the vitreous gel passes through the tear and accumulates behind the retina. The buildup of fluid behind the retina is what separates (detaches) the retina from the back of the eye. As more of the liquid vitreous collects behind the retina, the extent of the retinal detachment can progress and involve the entire retina, leading to a total retinal detachment. A retinal detachment almost always affects only one eye. The second eye, however, must be checked thoroughly for any signs of the problem. For a comprehensive article on this subject, please see Retinal Detachment: March 2000.

Medical dictionary. 2011.

Look at other dictionaries:

  • detached retina — Separation of most layers of the retina of the eye from the choroid, the pigmented middle layer of the eyeball. With age, small tears can develop in the retina, and the vitreous humour inside the eyeball leaks through, separating the retina from… …   Universalium

  • Retina — The retina is the nerve layer that lines the back of the eye, senses light, and creates impulses that travel through the optic nerve to the brain. There is a small area, called the macula, in the retina that contains special light sensitive cells …   Medical dictionary

  • retina — /ret n euh, ret neuh/, n., pl. retinas, retinae /ret n ee /. Anat. the innermost coat of the posterior part of the eyeball that receives the image produced by the lens, is continuous with the optic nerve, and consists of several layers, one of… …   Universalium

  • retina — n. a detached retina * * * [ retɪnə] a detached retina …   Combinatory dictionary

  • detached retina — de·tached retina di tacht n RETINAL DETACHMENT * * * see retinal detachment * * * a retina whose inner layers are separated from the pigment epithelial layer; see retinal detachment, under detachment …   Medical dictionary

  • detached retina — noun visual impairment resulting from the retina becoming separated from the choroid in the back of the eye; treated by photocoagulation • Syn: ↑retinal detachment, ↑detachment of the retina • Hypernyms: ↑visual impairment, ↑visual defect,… …   Useful english dictionary

  • detached retina — /dətætʃt ˈrɛtənə/ (say duhtacht retuhnuh) noun a condition in which the retina comes away from the back of the eye, potentially resulting in blindness. Also, retinal detachment …   Australian-English dictionary

  • detached — adjective 1》 separate or disconnected.     ↘(of a house) not joined to another on either side. 2》 aloof and objective. 3》 denoting a retina that has become separated from the underlying choroid tissue at the back of the eye, causing loss of… …   English new terms dictionary

  • detached retina — Synonyms and related words: amaurosis, blepharitis, cataract, choroiditis, conjunctivitis, cross eye, defective vision, esotropia, eye defect, glaucoma, gutta serena, iritis, keratitis, optic neuritis, pink eye, retinoblastoma, sty, trachoma,… …   Moby Thesaurus

  • detached retina — see retinal detachment …   The new mediacal dictionary

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